Not-so-minimal for minimally invasive surgery

Area of Science:

• Ophthalmology
• Retinal Surgery

Background:

• Sub-macular hemorrhage is a serious vision threat requiring prompt treatment.
• Current surgical methods utilize a 41-gauge needle for retinotomy, but its limitations include malleability, fragility, and cost.
• Alternative approaches are needed to improve safety and efficacy.

Purpose of the Study:

• To evaluate the safety and efficacy of a 26-gauge needle as an alternative for retinotomy in sub-macular hemorrhage surgery.
• To assess a modified surgical technique involving pre-injection of air into the sub-retinal space.

Main Methods:

• A prospective study involving six subjects with sub-macular hemorrhage.
• Retinotomy performed using a 26-gauge needle, supplemented by air injection prior to recombinant tissue plasminogen activator (r-tPA) administration.
• Standard vitrectomy and sub-retinal fluid drainage procedures were followed.

Main Results:

• The 26-gauge needle demonstrated safe and effective retinotomy with stable, self-sealing properties.
• Pre-injection of air enhanced r-tPA bioavailability by creating a tamponade effect, preventing drug efflux.
• No significant complications were reported in the study cohort.

Conclusions:

• The 26-gauge needle offers a safe and effective alternative for retinotomy in sub-macular hemorrhage surgery.
• The modified technique with air injection improves drug delivery and may enhance surgical outcomes.
• This approach presents a potentially more stable and cost-effective option compared to the 41-gauge needle.